Question

Calculati in două moduri:4x5+7x5,9x3-4x3,36:4+40:4,81:9-63:9​

Answer 1

Răspuns:

Explicație pas cu pas:

4 × 5 + 7 × 5 = 20 + 35 = 55 → primul mod

5 × ( 4 + 7 ) = 5 × 11 = 55 → al doilea mod

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9 × 3 + 4 × 3 = 27 + 12 = 39 → primul mod

3 × ( 9 + 4 ) = 3 × 13 = 39 → al doilea mod

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36 : 4 + 40 : 4 = 9 + 10 = 19 → primul mod

( 36 + 40 ) : 4 = 76 : 4 = 19 → al doilea mod

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81 : 9 - 63 : 9 = 9 - 7 = 2 → primul mod

( 81 - 63 ) : 9 = 18 : 9 = 2 → al doilea mod